Sugar Loaf, Monmouthshire
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The Sugar Loaf from the north-west, with the village of Llanbedr in the valley below
|Elevation||596 m (1,955 ft)|
|Prominence||411 m (1,348 ft)|
|Parent peak||Waun Fach|
|Location||Monmouthshire, United Kingdom|
|Parent range||Black Mountains|
|Topo map||OS Landranger 161|
Sugar Loaf, sometimes called The Sugar Loaf (Welsh: Mynydd Pen-y-fâl or Y Fâl), is a mountain situated 2 miles (3.2 km) north-west of Abergavenny in Monmouthshire, Wales. It is the southernmost of the summit peaks  of the Black Mountains, with a height of 1,955 feet (596 metres).
The original Welsh name of the hill appears to have been Mynydd Pen-y-fâl. Translated into English, this name means 'mountain of the head/top of the peak/summit' from mynydd, pen and bâl. The name Sugar Loaf has been popularly applied to numerous hills which have a perceived resemblance to a sugarloaf; the nearest other such hill is the Sugar Loaf in Carmarthenshire.
View from the summit
The view from the summit covers the Black Mountains to the north, the Cotswolds to the east, as far as the Brecon Beacons including Pen y Fan and Corn Du to the west and the Bristol Channel to the south. The Skirrid is easily visible to the immediate east, including its spectacular landslip at its northern end. On a clear day it is possible to see hills as far north as Shropshire and as far south as Somerset.
The Sugar Loaf is very popular with walkers and hillwalking enthusiasts and offers easy ascents on foot from the Sugar Loaf car park, at about 1,000 feet, or longer ascents from Abergavenny, Crickhowell or Llangenny.
It is a popular misconception that Sugar Loaf is an 'extinct volcano'; an idea born perhaps from the striking resemblance of its conical outline, particularly when seen from the east, to that of a classic volcano. It is however composed entirely of sedimentary rocks. In common with the rest of the Black Mountains, the hill is formed from Old Red Sandstone which was laid down during the early Devonian Period. Its lower slopes (up to around 1,000 feet (300 m) are composed of mudstones and sandstones assigned to the Senni Formation whilst its upper reaches are composed of the more sandstone-rich sequence known as the Brownstones Formation. The very summit of Sugar Loaf is formed from sandstones of the Quartz Conglomerate Group which are of late Devonian age. There are a number of landslips on its flanks which are believed to date from early post-glacial times. The former Usk Valley glacier divided to north and south of it as it travelled eastwards, though the mountain itself is largely free from glacial till.
The mountain is in the ownership of the National Trust who manage its grazing by Welsh mountain sheep. The lower slopes are deciduous mixed woodland with fern, heather and bilberry, known locally as whinberry, on the upland slopes. The wooded slopes have been designated a Site of Special Scientific Interest.
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